Android studio SPUtils封装后调用getBoolean时空对象引用

package com.example.framework.untils;

import android.content.Context;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;

public class SPUtils
{
    private static volatile SPUtils mInstance;
    private SharedPreferences.Editor editor;
    private SharedPreferences sp;

    public static SPUtils getInstance()
    {
        if (mInstance == null)
            try
            {
                if (mInstance == null)
                    mInstance = new SPUtils();
            }
            finally
            {
            }
        return mInstance;
    }

    public void deleteKey(String paramString)
    {
        this.editor.remove(paramString);
        this.editor.commit();
    }

    public boolean getBoolean(String key, boolean defValue)
    {
        return this.sp.getBoolean(key, true);
    }

    public int getInt(String paramString, int paramInt)
    {
        return this.sp.getInt(paramString, paramInt);
    }

    public String getString(String key, String defValue)
    {
        return this.sp.getString(key, defValue);
    }

    public void initSp(Context paramContext)
    {
        this.sp = paramContext.getSharedPreferences("Config", 0);
        this.editor = this.sp.edit();
    }

    public void putBoolean(String key, boolean Value)
    {
        this.editor.putBoolean(key, Value);
        this.editor.commit();
    }

    public void putInt(String paramString, int paramInt)
    {
        this.editor.putInt(paramString, paramInt);
        this.editor.commit();
    }

    public void putString(String paramString1, String paramString2)
    {
        this.editor.putString(paramString1, paramString2);
        this.editor.commit();
    }
}

package com.example.ido.ui;

import androidx.appcompat.app.AppCompatActivity;

import java.util.Timer;
import java.util.TimerTask;





import android.annotation.SuppressLint;
import android.app.Activity;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Bundle;

import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.text.TextUtils;
import android.util.Log;

import com.example.framework.entity.Constants;
import com.example.framework.untils.LogUntis;
import com.example.framework.untils.SPUtils;

import com.example.ido.MainActivity;
import com.example.ido.R;

import static com.example.framework.untils.LogUntis.*;

/**
 *启动页
 * 全屏
 *
 */
public class IndexActivity extends AppCompatActivity {

    private static final int SKIP_MAIN = 1000;

    private Handler mHandler = new Handler(new Handler.Callback() {
        @Override
        public boolean handleMessage(Message message) {
            switch (message.what){
                case SKIP_MAIN:
                    LogUntis.e("0");
                    startMain();
            }
            return false;
        }
    });



    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_index);

        mHandler.sendEmptyMessageDelayed(SKIP_MAIN,2*1000);
    }

    private void startMain() {
        boolean isFirstApp = SPUtils.getInstance().getBoolean(Constants.SP_IS_FIRST_APP,true);
        //boolean isFirstApp = true;
        LogUntis.e("1");

        Intent intent = new Intent();
        if(isFirstApp){
            //跳转引导页
            LogUntis.e("2");
            intent.setClass(this,GuideActivity.class);
            SPUtils.getInstance().putBoolean(Constants.SP_IS_FIRST_APP,false);

        }else{
            String token = SPUtils.getInstance().getString(Constants.SP_TOKEN,"");
            if (TextUtils.isEmpty(token)){
                intent.setClass(this,LoginActivity.class);
            }else {
                intent.setClass(this, MainActivity.class);
            }
        }
        startActivity(intent);
        finish();
    }

}

启动页跳转的时候定义的变量获取不到 报错空对象引用

Attempt to invoke virtual method 'boolean com.example.framework.untils.SPUtils.getBoolean(java.lang.String, boolean)' on a null object reference

看看这个   https://blog.csdn.net/ouyang_peng/article/details/12784303